Printing-cylinder.



PATENTED JULY 3, 1906.

D. R. MILLER. PRINTING CYLINDER.

APPLIOATLON FILEI? DEG. 23. 1903.- RBNEWBD SEPT. 22, 1906.

BA vii iii/fill er m: NORRIS PETERS cc, WASHINGTONpl c UNITED STATE 8 PATENT omca DAVID R. MILLER, (IE CHICAGO, ILLINOIS.

PRINTING-CYLINDER.

To all whom it may concern.-

Be it known that I, DAVID R. MILLER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Printing-Cylinders; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in printing-cylinders; and the object in view is the provision of means for facilitating the ap plication to such cylinder of printing-plates of varying thicknesses.

IVith this and further objects in view the invention comprises a cylinder and inter changeable surfaces therefor.

It further comprises certain other novel constructions, combinations, and arrangements of parts, as will be hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 represents a view, partially in section and partially in end elevation, of a printing-roll embodying the features of the present invention. Fig. 2 represents a view in side elevation of the same.

Heretofore it has been common in preparing a cylinder for printing to cut off a sufficient amount of the surfaceof the cylinder for permitting the plate to be inserted for leaving the printing-surface thereof alone exposed; but difliculty has been experienced in printing with an electrotype-plate, for instance, which is usually of about threesix teenths of an inch in thickness, and then removing such electrotype-plate and inserting an aluminium plate for lithograph work, which plate is usually approximately onethirty-second of an inch thick. I make possible the positioning of the plates of different thicknesses by the employment of the elements disclosed in the accompanying drawings, in which 1 indicates any suitable shaft formed with journals. (Not disclosed.) Carried by the shaft 1 are the spokes 2 2 of cylinder 3, said cylinder consisting of a skeleton divided into segmental openings partially filled by sections 4 4. Each section 4 is provided with a central journal 5, upon which it is rotatably mounted, said journal finding bearings in the end webs 6 of the cylinder 3. Each section 4 is formed with two convexed surfaces c0n- Specification of Letters Patent. Application filed December 23, 1903. Renewed September 22,

Patented July 3, 1906.

1905- Serial No. 279,712.

forming in curvature to the circle described by the cylinder 3. Each section 4 is provided at each end with apertures 7 7, adapted to receive locking-pins 8 8, said pins being threaded, as seen in dotted lines in Fig. 2, through the end webs 6 of the cylinder 3. When the'pins 8 are thus positioned, the sections 4 will be heldwith their outer surfaces flush with and continuous of the surface of the cylinder 3, each of said sections being capable of being rotated upon its axis 5 after its plugs 8 have been removed, whereby the inner surface of the respective section is caused to take the place of the former outer surface, and the former outer surface becomes the inner surface. Now as each of the surfaces of each section 4 is curved to conform to the general contour of the cylindcr 3 one of said surfaces may be cut to receive a relatively thick plate and the other surface prepared to receive a comparatively thin plate, or it may be found desirable to out both of the surfaces the same depth, so that two pieces of work may be held by the same cylinder at the same time and interchangeably utilized.

I have illustrated in connection with each section 4 suitable undercut grooves 9 9, extending across the sections in various directions, said grooves being commonly employed for facilitating the applying of a printing-plate to the cylinder. Of course any other attaching means might be employed without deviation from the present invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination der, of printin devices carried thereby and constituting the printing-surface thereof, each of said devices being reversibly mounted and having a plurality of faces.

2. The combination with a printing-cylinder, of printing devices constituting the en tire printing-surface thereof, each of said devices being adapted to be inverted, and each of said devices having a plurality of printingfaces.

3. The combination with a printing-cylinder, of a section rotatably mounted thereon formed with depressed plate-carrying surfaces of varying depths.

4. The combination with a printing-cylinder, of a plurality of interchangeable, reversible printing devices carried by said cylinder.

5. The combination with a cylinder, of a with a printing-cylin plurality of invertible sections carried thereby, each being formed with opposing printlng-surfa ces 6. In a printing apparatus, the combination with a cylinder, of reversible sections interposed in the periphery thereof, each 0 said sections being provided with a plurality of faces conforming to the contour of the cylinder.

7 The combination with a printing-cylinder, of an invertible section formed with a plurality of faces conforming to the curvature of said cylinder.

8. The combination with a cylinder, of an invertible section carried thereby formed with opposing, curved surfaces conforming to the curved contour of said cylinder.

9. The combination with a printing-cylinder, of a section, means rotatably supporting said section between the ends of said cylinder, and means for retaining said section against rotation.

10. The combination with a printing-cylinder, of a section rotatably carried thereby having surfaces conforming to the contour of said cylinder, and pins carried by said cyll 1 1 l l l ii 1 l 1 inder removably engaging said sections for locking the same against rotation.

11. The combination with a cylinder having end webs, of a section rotatably mounted between said webs and formed with surfaces conforming to the curvature of said cylinder, and pins extending through said webs and engaging said sections for retaining the same against movement with respect to the cylinder.

12. The combination with a printing-cylinder, of a rotatably-mounted section carried thereby formed with opposing, depressed plate-carrying surfaces of different depths for receiving plates of varying thickness.

13. The combination with a printing-cyl inder, of an invertible section formed with. a plurality of depressed faces of varying depths conforming to the curvature of said cylinder.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

DAVID R. MILLER.

Witnesses BENJAMIN SAMUELS, lsAAo B. LIPSON. 

